Finding the Third Proportional to 1,218,386 and 2,640,162

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,386 : 2,640,162 = 2,640,162 : x
2. Step 2: Convert to fraction form
   1,218,386/2,640,162 = 2,640,162/x
3. Step 3: Cross multiply
   1,218,386x = 2,640,162 × 2,640,162
4. Step 4: Simplify right side
   1,218,386x = 6,970,455,386,244
5. Step 5: Solve for x
   x = 6,970,455,386,244/1,218,386
6. Step 6: Final answer
   x = 5,721,056.70